package com.youyu.youyumall.product.service.impl;

import io.netty.util.internal.ObjectUtil;
import org.apache.commons.lang3.ObjectUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.youyu.youyumall.common.utils.PageUtils;
import com.youyu.youyumall.common.utils.Query;

import com.youyu.youyumall.product.dao.CategoryDao;
import com.youyu.youyumall.product.entity.CategoryEntity;
import com.youyu.youyumall.product.service.CategoryService;


@Service("categoryService")
public class CategoryServiceImpl extends ServiceImpl<CategoryDao, CategoryEntity> implements CategoryService {

    @Autowired
    CategoryDao categoryDao;

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<CategoryEntity> page = this.page(
                new Query<CategoryEntity>().getPage(params),
                new QueryWrapper<CategoryEntity>()
        );

        return new PageUtils(page);
    }

    @Override
    public List<CategoryEntity> listWithTree() {
        //1.查出所有分类
        List<CategoryEntity> allCategoryEntityList = baseMapper.selectList(null);

        //2.组装成父子的树形结构
        allCategoryEntityList.stream().filter((categoryEntity) -> categoryEntity.getParentCid() == 0)
                .map(categoryEntity -> {
                    categoryEntity.setChildren(getChildrens(categoryEntity,allCategoryEntityList));
                    return categoryEntity;
                })
                .sorted(
                        Comparator.comparingInt(menu -> (menu.getSort() == null ? 0 : menu.getSort()))
                )
                .collect(Collectors.toList());

        return allCategoryEntityList;
    }

    private List<CategoryEntity> getChildrens(CategoryEntity root,List<CategoryEntity> all){
        List<CategoryEntity> children = all.stream()
                .filter(categoryEntity -> Objects.equals(categoryEntity.getParentCid(),root.getCatId()))
                .map(categoryEntity -> {
                    categoryEntity.setChildren(getChildrens(categoryEntity,all));
                    return categoryEntity;
                })
                .sorted(
                        Comparator.comparingInt(menu -> (menu.getSort() == null ? 0 : menu.getSort()))
                )
                .collect(Collectors.toList());
        return children;
    }
    @Override
    public void removeMenuIds(List<Long> aslist){
      //TODO 1.检查当前删除的菜单，是否被别的地方引用
        baseMapper.deleteBatchIds(aslist);

    }
}